---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/420029#article
headline: "420029: Knowledge source access forbidden"
url: https://www.twilio.com/docs/api/errors/420029
inLanguage: en
dateModified: 2026-07-29T18:16:50.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 420029: Knowledge source access forbidden

Log Type: TWILIO

Log Level: ERROR

## Description

The web crawler received a `403 Forbidden` response when attempting to access the target URL during knowledge ingestion. The server understood the request but refuses to authorize access.

### Possible causes

* The target URL is restricted by IP address or geographic location
* The site blocks automated crawlers or bots
* The content requires specific permissions or roles
* The site's `robots.txt` file disallows crawling
* Rate limiting or anti-bot protection is blocking the crawler

### Possible solutions

* Verify the URL is publicly accessible from different locations and IP addresses
* Check the site's `robots.txt` file to ensure crawling is allowed
* If the site blocks crawlers, download the content manually and upload as a file
* Use the File or Text knowledge source types for restricted content
* Contact the site administrator to allowlist Twilio's crawler
* Review the knowledge source error details in the Twilio Console